Sliding Patio Door Installation Costs UK — What to Charge in 2026

Supply and Fit Costs — UPVC vs Aluminium

The single biggest driver of price is the material. UPVC is the volume product — affordable, well insulated and fine for most standard 2-pane openings. Aluminium is the premium choice: stronger frames mean slimmer sightlines, larger panes and bigger spans, but you pay for it. Here's how the two compare on a like-for-like installation into an existing opening.

Standard UPVC Sliding Patio Door (2-pane)

A standard 2-pane UPVC sliding patio door supplied and fitted like-for-like into an existing opening is the bread-and-butter job in this trade. One pane is fixed, one slides. It's a straightforward swap that a competent two-person team can complete in a day, including removing the old unit and making good.

• Supply and fit, 2-pane UPVC, like-for-like: £1,300–£2,200 all in
• White is cheapest; coloured or woodgrain foil finishes push toward the top of the range

Price toward the upper end for larger openings, non-standard sizes, upgraded glazing or any colour other than white. The lower end assumes a stock white unit in a common size with easy access.

Aluminium Sliding Patio Door

Aluminium frames are far stronger than UPVC, which lets the manufacturer use thinner profiles and bigger glass panes. The result is the slim-sightline, glass-dominant look that drives most premium enquiries. Systems from the likes of Smart, Origin, Schüco and Reynaers sit at this end of the market.

• Supply and fit, aluminium 2-pane: £2,500–£5,000+ depending on size and pane count

Aluminium is roughly twice the price of an equivalent UPVC unit. The premium buys slimmer frames, larger glass area, a wider colour range as standard, and a more robust feel that higher-spec customers expect. For most installers this is the highest-margin product in the patio door range.

Larger and 3/4-pane Doors and Lift-and-Slide

Go beyond a standard 2-pane unit and the price climbs quickly. Three- and four-pane configurations, wide spans and lift-and-slide mechanisms — where the door physically lifts off its seals before gliding on the track — are all heavier, harder to handle and need more glass.

• Large or 3/4-pane sliding doors and lift-and-slide: £4,000–£8,000+ for big aluminium spans

Big spans of glass are heavy and often need three or four people plus lifting equipment to install safely. Factor the extra labour and access into your quote — these are not one-day, two-person jobs.

Labour-Only (Customer-Supplied Door)

Some customers buy the door themselves — usually online or through a trade contact — and want you to fit only. For a straightforward like-for-like swap into an existing opening, this is the cleanest labour-only job in the trade.

• Fit only, like-for-like swap into existing opening: £350–£700

Be clear in writing that fit-only excludes any warranty on the door itself and that you can't be responsible for a unit that arrives wrong-sized or damaged. Always check the customer-supplied door has been measured to fit the actual opening before you commit a price or a date — a unit that doesn't fit becomes your problem on the day.

Creating or Widening a New Opening

A like-for-like swap is one thing; cutting a new or wider opening into a wall is a different job entirely. This involves structural work — fitting a lintel to carry the load above, propping during the work, and making good the brickwork, plaster and floor afterwards.

• Creating or widening a new opening (lintel, structural work, making good): +£1,000–£2,500+

This work often needs a structural engineer to specify the lintel and will usually require building control sign-off because you're altering a load-bearing element. Don't quote a new-opening job off a quick look — get the structural element specified properly and price the engineer's fee and building control application into the quote. Underquoting structural work is one of the fastest ways to lose money on a door job.

Extras That Affect the Price

Beyond the base unit, a long list of options moves the price. Each is a legitimate line item — quote them separately so the customer can see what they're choosing.

• Integral blinds: sealed inside the glazed unit, dust-free and tidy — adds a meaningful premium per pane
• Triple glazing: better U-values and acoustics, but heavier and dearer than double
• Upgraded locking: high-security multipoint and anti-lift hardware, often specified for ground-floor doors
• Made-to-measure / non-standard sizes: bespoke units cost more and have longer lead times than stock sizes
• Colour and foil finishes: anything other than white UPVC adds cost; aluminium colour is usually included but special RAL colours are extra
• Threshold options: low or level-access thresholds for wheelchair access or a flush finish to a patio, versus a standard upstand threshold

Sliding vs Bifold vs French Doors

Customers frequently ask which type to choose, and being able to explain the trade-offs clearly helps you close the job. The three main options work very differently.

• Sliding patio doors: maximise glass and don't intrude into the room because the panes slide past each other. Great for a glass-dominant look and where furniture sits close to the doors.
• Bifold doors: fold and stack to one side so the opening can be thrown fully open in summer. The trade-off is more frame and thicker sightlines when closed, and a higher price for the same width.
• French doors: a pair of hinged doors that swing open. Cheaper for smaller openings but they intrude into the room or the patio and give far less glass than a slider of the same width.

In short: sliders maximise glass and stay out of the way, bifolds open the whole wall up, and French doors suit smaller openings on a tighter budget.

Security and Glass Specification

Ground-floor glazed doors are a security point and customers increasingly ask about it. The benchmark is PAS 24 — the enhanced security standard that doors should meet, and which is mandatory on new dwellings under Part Q of the Building Regulations.

• Multipoint and anti-lift locking: a good sliding door uses a multipoint lock and anti-lift blocks so the sliding pane can't be jacked out of the track
• Laminated glass: harder to break through than toughened glass alone and a sensible upgrade on accessible doors
• PAS 24 certification: specify it where the customer wants reassurance, and always on new-build work

Energy Efficiency and U-values

Glazed doors are assessed for thermal performance just like windows. The two figures customers see are the U-value (how much heat the unit lets through — lower is better) and the Window Energy Rating (a banded A-to-G label that summarises overall efficiency).

Building Regulations Part L sets a maximum U-value for replacement glazed doors, so any unit you fit needs to meet the current standard. Triple glazing and warm-edge spacer bars improve the U-value but add weight and cost. Quote the glazing spec explicitly so the customer understands what they're getting — "A-rated" or a stated U-value reads far better than a bare price.

Building Regulations and FENSA Compliance

This is the compliance point every installer needs to get right: installing or replacing an external glazed door is notifiable under the Building Regulations. It must meet the thermal requirements of Part L and, on new dwellings, the security requirements of Part Q.

There are two ways to satisfy this:

• Self-certify through a competent person scheme: a FENSA or CERTASS registered installer can self-certify the work and the customer receives a certificate of compliance — this is the route most installers use
• Building control: if you are not registered, the work must be notified to and signed off by your local authority building control, which means an inspection and a fee

If you're not registered with FENSA or CERTASS, factor the building control application into both your price and your timeline. Customers care about the compliance certificate because they'll need it when they come to sell the house — make clear in your quote which route you're using.

What Affects the Quote

Patio door quotes go wrong when the installer prices off a phone description rather than a proper survey. The variables that move the price are:

• Material: UPVC versus aluminium roughly doubles the unit cost for the same size
• Size and number of panes: 2-pane is standard; 3- and 4-pane and wide spans cost and weigh much more
• Glazing spec: double vs triple, laminated glass, integral blinds and warm-edge units all add cost
• Like-for-like vs new opening: a swap is a day; a new or widened opening adds structural work, an engineer and building control
• Access and scaffolding: first-floor balconies, tight side access or restricted parking add time and may need access equipment
• Removal and disposal: taking out and tipping the old unit and glass is a cost — price it in, don't absorb it

Quick Reference: Sliding Patio Door Prices UK 2026